Abstract: Various approaches provide for visual similarity-based search techniques that allow a user to provide two-dimensional image data (e.g., still images or video) about an item and search for items having related three-dimensional features. In order to create an electronic catalog of items that is searchable by three-dimensional features, the features are extracted from image data for each item. The three-dimensional features can be extracted using a trained model, such as a trained neural network or other machine learning-based approach. Thus, three-dimensional features of items in the electronic catalog can be determined and used to select or rank the items in response to a visual search query based on determined three-dimensional features of the query item. For example, three-dimensional features of the query item can be used to query the electronic catalog of items, in which items having visual attributes of similar three-dimensional features are selected and returned as search results.

Abstract: An apparatus for testing electronic components includes a base, a screw rod structure, a first sliding portion, a second sliding portion, a vacuum-based or similar adsorption structure, and a probe. The screw rod structure is fixedly connected to one side of the base. The first sliding portion is slidably positioned on the screw rod structure. The second sliding portion is slidably positioned on the first sliding portion. The adsorption structure is arranged on the second sliding portion. The adsorption structure gathers and holds an electronic component. The probe and the electronic component are arranged to correspond. The probe is electrically connected to a test device. The test device tests the electronic component through the probe.

Abstract: A secondary electron probe is provided. The secondary electron probe comprises a porous carbon material layer. The porous carbon material layer consists of a plurality of carbon material particles and a plurality of micro gaps, the plurality of micro gaps are located between the plurality of carbon material particles. The porous carbon material layer is an electronic blackbody. A secondary electron detector and a scanning electron microscope probe using the secondary electron probe are also provided.

Abstract: A multi-functional composite catalyst includes a catalyst support material, a preformed catalyst material at least partially secured in the catalyst support, and at least one catalytically active compound supported by the catalyst support, the preformed catalyst material, or both. The catalyst support material may include fumed silica, alumina, fumed alumina, fumed titania, or combinations of these. A catalytic activity of the catalytically active compound may be different than a catalytic activity of the preformed catalyst material. The composite catalyst may be catalyst for producing propene from 2-butene and may include a zeolite as the preformed catalyst material and a metal oxide, such as tungsten oxide, as the catalytically active material.

Abstract: A electronic blackbody cavity is provided. The electronic blackbody cavity comprises an inner surface; a chamber surrounded by the inner surface; an opening configured to make an electron beam enter the chamber; and a porous carbon material layer located on the inner surface. The porous carbon material layer consists of a plurality of carbon material particles and a plurality of micro gaps. The plurality of micro gaps are defined by the plurality of carbon material particles. A secondary electron detection device using the electronic blackbody cavity is also provided.

Abstract: A method for making an electronic blackbody structure is provided. The method comprises: providing a growing substrate; growing a carbon nanotube array on the growing substrate, the carbon nanotube array including a top surface and a bottom surface, the bottom surface being connected to the growing substrate; and separating the carbon nanotube array from the growing substrate, exposing the bottom surface of the carbon nanotube array, and the bottom surface of the carbon nanotube array is used to absorb electrons. An electronic blackbody structure is further provided.

Abstract: A secondary electron probe is provided. The secondary electron probe comprises a porous carbon material layer. The porous carbon material layer consists of a plurality of carbon material particles and a plurality of micro gaps, the plurality of micro gaps are located between the plurality of carbon material particles. The porous carbon material layer is an electronic blackbody. A secondary electron detector and a scanning electron microscope probe using the secondary electron probe are also provided.

Abstract: An electron blackbody material is provided. The electron blackbody material is a porous carbon layer. The porous carbon layer consists of a plurality of carbon material particles and a plurality of micro gaps, the plurality of micro gaps are located between the plurality of carbon material particles. An electron detector using the electron blackbody material is also provided.

Abstract: An device for measuring electron beam comprises a Faraday cup comprising an opening; a porous carbon material layer located on a surface of the Faraday cup and suspended at the opening; and an electricity meter electrically connected to the porous carbon material layer. A length of a suspended portion of the porous carbon material layer is greater than or equal to a maximum diameter of an electron beam to be measured. A diameter or a width of the porous carbon material layer is smaller than a minimum diameter of a cross section of the electron beam to be measured. The porous carbon material layer comprises a plurality of carbon material particles, and a plurality of micro gaps exist between the plurality of carbon material particles. A method for measuring an electron beam using the device for measuring electron beam is also provided.

Abstract: A remote sensing-based dynamic estimation method for the outflow process of an ungauged free overflow reservoir comprising the following steps: estimating the storage volumes of the water reservoir at different water levels from the water level-area relation curve of the water reservoir by using a digital elevation model, and thereby establishing an area-storage volume relation curve of the water reservoir; obtaining the storage volumes of the water reservoir at the corresponding times; obtaining the change of the storage volume of the water reservoir through accumulative calculation on the change of the storage volume in the time periods corresponding to the two remote sensing images; gradually approximating an outflow coefficient of the water reservoir by using a bisection method; taking the final approximation result as the outflow coefficient of the ungauged reservoir, and calculating the outflow process of the water reservoir during floods.

Abstract: An electrical impedance tomography apparatus (100) and method. The electrical impedance tomography apparatus (100) consists of a sensing module (101), a data acquisition module (102), a communication module (103), a data processing module (104), an image display module (105) and a power supply module (106). The electrical impedance tomography apparatus (100) is applicable to medical imaging, can employ an in vivo electrode to perform multi-frequency-one-time excitation and measurement on a biological tissue under test and use a measured complex voltage signal to perform three-dimensional image reconstruction, and can simultaneously display ventilation and perfusion images in real time, thereby increasing an amount of acquired data, increasing the speed of data acquisition, increasing the sensitivity of a measurement signal to the conductivity of an in vivo tissue, and facilitating image analysis and comparison, disease detection and diagnosis.

Abstract: The present application relates to a tower tube section, a tower frame and a wind power generator set. The tower tube section includes a tower tube section body; a reinforcing assembly including a supporting member connected to the tower tube section body and a plurality of reinforcing cables connected to the supporting member. The plurality of reinforcing cables are arranged at intervals along a circumferential direction of the tower tube section body, and each of the plurality of reinforcing cables extends along an axial direction of the tower tube section body and is apart from a periphery surface of the tower tube section body by a predetermined distance in a radial direction of the tower tube section body. The tower tube section has a strong bearing capacity and low cost, which can meet the power generation benefits of the wind power generator set.

Abstract: Monodisperse structures with precise numbers of polymer arms and oligonucleotide chains conjugated to a backbone are disclosed. The structures, referred to miktoarm conjugates, are resistant to nuclease degradation and are capable of regulating gene expression in the absence of a co-carrier.

Abstract: An apparatus and method for updating features on an image scanning apparatus has a client computing device capture and decode an image of a first symbol that encodes data that identifies the image scanning apparatus, request a server to enable a feature on the image scanning apparatus, receive activation data from the server to enable the feature, and generate an image of a second symbol on a display of the client computing device that encodes the activation data. The image scanning apparatus captures and decodes an image of the second symbol, and uses the decoded activation data to enable a feature resident on the image scanning apparatus or to request a download of the feature from the client computing device if the feature is not resident on the image scanning apparatus. The client computing device downloads the feature from the server, and uploads the feature to the image scanning apparatus.

Abstract: A relatively simple status indicator for a building control device that helps the user more quickly and intuitively identify the operation status of the building control system and more quickly troubleshoot faults and/or other problems that may occur within the building control system. This may help reduce the cost of maintain the building control system and may help reduce unwanted downtime of the building control system.

Abstract: An device for detecting electron beam comprises a porous carbon material layer, a Faraday cup and an image display. The porous carbon material layer comprises a plurality of carbon material particles and a first through hole. A plurality of micro gaps exist between the plurality of carbon material particles. A cross-sectional area of the first through hole is less than or equal to a cross-sectional area of the electron beam. The Faraday cup is under the porous carbon material layer and comprises an opening. The opening and the first through hole penetrate with each other. The image display is electrically connected to the porous carbon material layer and configured to form an image with different colors according to charge generated in the porous carbon material layer. A method for detecting electron beam using the device for detecting electron beam is also provided.

Abstract: A device for measuring a secondary electron emission coefficient comprises a scanning electron microscope, a first collecting plate, a second collecting plate, a first galvanometer, a second galvanometer, a voltmeter, and a Faraday cup. The scanning electron microscope comprises an electron emitter and a chamber. A sample is located between the first collecting plate and the second collecting plate. The first galvanometer is used to test a current intensity of electrons escaping from the sample and hitting the first collecting plate and the second collecting plate. A high-energy electron beam emitted by the electron emitter passes through the first collecting plate and the second collecting plate, and enters the Faraday cup. The second galvanometer is used to test a current intensity of electrons entering the Faraday cup.

Abstract: A thin film transistor substrate allowing an increase in proportionate size of the display area includes gate driving units, signal test pads, a first function line, and a first-stage gate output signal line in a surrounding non-display area, the display area having pixels. The gate driving units include a first-stage gate driving unit with an output terminal electrically connected to one row of pixels. The first function line has a first function but can also multiplex as a connecting line between the first-stage gate output signal line and one test pad. The first-stage gate output signal line is electrically insulated from the first function line during the first function of the first function line but is electrically connected to the first function line when multiplexed.

Abstract: Methods, apparatus, computer program products Geohash-based traffic management are provided. The method comprises receiving, by one or more processing units, respective operating status data of one or more vehicles travelling within a Geohash cell; generating, by one or more processing units, one or more service messages based on the received respective operating status data according to one or more service specifications; and providing, by one or more processing units, at least one of the one or more service messages responsive to a request from a vehicle travelling within the Geohash cell.